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Slope and rate of change |
2008-06-23 |
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From Lee:
What is the difference between a slope and a rate of change?
Answered by Stephen La Rocque. |
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An 18,000 mile automobile trip |
2008-06-23 |
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From rachel:
two men were about to start on an 18,000 mile automobile trip. The tires on their car were each good for 12,000 miles but not a foot more. how many spares will they need to go 18,000 miles
Answered by Stephen La Rocque. |
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A number that ends with 2 |
2008-06-23 |
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From Jim:
A number ends in 2. If you were to place that digit at the beginning of the
number, the resulting number will be twice the original. Find the smallest
such number.
Answered by Stephen La Rocque. |
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3y^2 - 48 = 0 |
2008-06-23 |
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From marquis:
3y^2 - 48 = 0
Answered by Stephen La Rocque. |
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111...111 * 2003 |
2008-06-23 |
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From Peggy:
Number a = 111...111 formed by 2003 1's. Find the sum of the digits of the number 2003 * a.
Answered by Penny Nom. |
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Watts and kilowatts |
2008-06-23 |
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From Kenneth:
Hello:
Here is my question:
Find the kilowatt-hours of electricity used by a light bulb with a rating of 60 watts if the light is used for 10 hours.
Answered by Stephen La Rocque and Harley Weston. |
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Four digit combinations |
2008-06-23 |
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From star:
Can you you give me a list of all 4 digit combination starting with the number 7, for example 7123,7213.
Answered by Penny Nom. |
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The sum of the digits of a number |
2008-06-23 |
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From Ben:
Question: Using mathematical induction, prove that if the sum of the digits of a number is divisible by three, then the number itself is also divisible by 3.
Answered by Penny Nom. |
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I will be x years old in the year x squared |
2008-06-22 |
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From rachel:
you probably know someone who will x years old in the year x squared. When was that person born?
Answered by ha. |
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How many gallons in an oval shaped tank? |
2008-06-22 |
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From dale:
how many gallons in an oval shaped tank, 72in long x46.5in wide x23in deep
Answered by Penny Nom. |
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The height of an isosceles triangle |
2008-06-22 |
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From Evelyn:
Hi! I am facing problem finding the height of the isosceles triangle.
Answered by Penny Nom. |
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How many face does a cone have? |
2008-06-21 |
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From Vanessa:
How many face does a cone have?
Answered by Harley Weston. |
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Two forces acting on a body |
2008-06-21 |
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From Rita:
Before answering the question below, what exactly is, in basic words, resultant force?
QUESTION:
Two forces of 50 and 68 pounds act on a body to produce a resultant force of 70 pounds.
Find, to the nearest 10 minutes or nearest tenth of a degree, the angle formed between the resultant force and the smaller force.
Answered by Harley Weston. |
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30% profit |
2008-06-19 |
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From Julie:
how do i calculate the price per person that will return a 30% profit on the sales revenue generated?
Answered by Penny Nom. |
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sin(2x)/sin(3x) |
2008-06-19 |
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From matt:
how does sin2x break down (not with identities) and how would sin3x be created. My
prob. is sin 2x/ sin 3x and I want to know how the double(or triple angle) would break
down. I want to be able to cancel out sins. Thanks!
Answered by Harley Weston. |
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